	@media screen and (min-width:1200px) {
	  html {
	    font-size: 20px;
	  }
	}

	@media screen and (min-width:1200px) and (max-width:1200px) {
	  html {
	    font-size: 16px;
	  }
	}

	@media screen and (max-width:800px) {
	  html {
	    font-size: 12px;
	  }
	}

	* {
	  margin: 0;
	  padding: 0;
	  box-sizing: border-box;
	}

	html,
	body {
	  width: 100%;
	  height: 100%;
	  font-size: 16px;
	  font-family: '楷体';
	}

	div {
	  padding: 2rem;
	  width: 25rem;
	  height: 16.5rem;
	  margin: 2.5rem auto;
	  border: 0.1rem solid #909399;
	  border-radius: 6px;
	  background: #EBEEF5;
	}

	div h2 {
	  padding-bottom: 2rem;
	}

	div button {
	  border: none;
	  padding: 0.2rem 0.6rem;
	  cursor: pointer;
	  background-color: #409EFF;
	  color: white;
	  display: block;
	  width: 10rem;
	  height: 2rem;
	  text-align: center;
	  line-height: 2rem;
	  transition: all .6s;
	}

	div button:hover {
	  opacity: .8;
	}

	span {
	  display: block;
	  width: 100%;
	  height: 2.5rem;
	  margin-top: 2rem;
	  background-color: #F56C6C;
	  color: white;
	  text-align: center;
	  line-height: 2.5rem;
	  opacity: 0;
	  padding: 0 1rem;
	}